Ian has 108 balls and Jack has 349 balls. How many balls must Jack give to Ian so that Ian will have 117 less balls than Jack?
|
Ian |
Jack |
Total |
Before |
108 |
349 |
457 |
Change |
+ ? |
- ? |
|
After |
1 u |
1 u + 117 |
457 |
The total number of balls remains unchanged after Jack gives to Ian.
Total number of balls
= 108 + 349
= 457
Total number of balls in the end
= 1 u + 1 u + 117
= 2 u + 117
2 u + 117 = 457
2 u = 457 - 117
2 u = 340
1 u = 340 ÷ 2 = 170
Number of balls that Jack must give to Ian
= 170 - 108
= 62
Answer(s): 62